Slot machines used to fill entire casino floors with cabinets over 50 feet tall...

https://xeon-wiki.win/index.php/Why_Do_Mobile_Slots_Still_Show_So_Much_Information_on_a_Tiny_Screen%3F

Slot machines used to fill entire casino floors with cabinets over 50 feet tall and screens bigger than 40 inches. Now, those same games fit neatly on phone screens just 6 inches wide